The invention provides a transformer system and method of attaching a laminated housing on the same. The two-point modulator includes a first circuit path for impressing an analog modulation signal into a first point in the PLL circuit, and a second circuit path for impressing a digital modulation signal into a second point in the PLL circuit. Thus, the device and method can process the packets that are inputted to or outputted from the peripheral interface and the network device connected to the peripheral interface in a manner similar to the typical method for processing the packets that are only inputted to or outputted from the physical port.